# ---
# title: 192. Word Frequency
# id: problem192
# author: Tian Jun
# date: 2020-10-31
# difficulty: Medium
# categories: 
# link: <https://leetcode.com/problems/word-frequency/description/>
# hidden: true
# ---
# 
# Write a bash script to calculate the frequency of each word in a text file
# `words.txt`.
# 
# For simplicity sake, you may assume:
# 
#   * `words.txt` contains only lowercase characters and space `' '` characters.
#   * Each word must consist of lowercase characters only.
#   * Words are separated by one or more whitespace characters.
# 
# **Example:**
# 
# Assume that `words.txt` has the following content:
# 
#     
#     
#     the day is sunny the the
#     the sunny is is
#     
# 
# Your script should output the following, sorted by descending frequency:
# 
#     
#     
#     the 4
#     is 3
#     sunny 2
#     day 1
#     
# 
# **Note:**
# 
#   * Don't worry about handling ties, it is guaranteed that each word's frequency count is unique.
#   * Could you write it in one-line using [Unix pipes](http://tldp.org/HOWTO/Bash-Prog-Intro-HOWTO-4.html)?
# 
# 
## @lc code=start
using LeetCode

## add your code here:
## @lc code=end
